Senior Groundwater Modeler / Hydrogeologist

About the role

In this position, you’ll collaborate with senior modelers on hydrodynamic, sediment transport, and water-quality projects. Your work will help assess thermal impacts, pathogens, biochemical oxygen demand, dissolved oxygen, nutrients, algae, and organic or metal contamination in lakes, rivers, estuaries, and coastal waters.

Responsibilities

• Evaluate environmental data and set up, execute, and quality-check mathematical models.
• Participate in project meetings, proposal preparation, report writing, and presentations.
• Develop statistical and graphical comparisons of model results and field data.
• Perform other duties as needed, including field tasks such as drilling, well installation, slug tests, and pump tests in consolidated and unconsolidated formations.

Requirements

• Bachelor’s degree in environmental engineering/science, oceanography, or a closely related field.
• Minimum of 7 years of experience in hydrodynamic or water-quality modeling projects.
• Strong analytical, problem-solving, and communication skills (oral and written).
• Proficiency with Microsoft Office Suite.
• Self-motivated, able to work independently and collaboratively within project teams.
• Commitment to active participation in our employee-owned culture.

Preferred Qualifications

• Minimum of 10 years of professional experience as a hydrogeologist or closely aligned profession (advanced degrees may substitute for experience).
• Experience conducting contaminated site investigations, including sample collection and analysis of soil, groundwater, surface water, and sediment.
• Experience preparing groundwater monitoring reports and evaluating laboratory analytical data.
• Knowledge of conceptual site models and ability to identify data gaps for field investigation scoping.
• Professional Geologist (PG) or Certified Professional Geologist (CPG) certification.
• Experience with Federal environmental regulations (CCR, CERCLA, RCRA, CWA, CAA, etc.).
• Experience on Coal Combustion Residual (CCR) projects involving groundwater monitoring, statistical analysis, site characterization, and corrective measures.
• Familiarity with boring log digitization software (e.g., gINT, OpenGround) and hydrogeological tools (e.g., Surfer, Aqtesolv).
• Willingness to perform physically demanding tasks in adverse conditions (rugged terrain, remote locations, extreme temperatures).
• OSHA 40 Hour HAZWOPER Certification and MSHA training (a plus).
• Professional Engineer (PE) license.
• Local candidates in the Greater Philadelphia area preferred.

Benefits

As employee-owners, we all have a role in creating an inclusive environment where each of us is welcomed, valued, respected, and empowered. Our eight Employee Network Groups (Asian Pacific, Black, Hispanic/Latino(a), LGBTQ+, People with Disabilities, Veterans, Women, Young Professionals) foster belonging and provide support, with executive sponsorship and open participation for all employees.

Location

United States—Pennsylvania—Plymouth Meeting or Philadelphia.